メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.355150867323 43.0686310649208, 141.353389771385 43.0683796260145, 141.353698310528 43.067198467971, 141.355455336974 43.0674570428908, 141.355150867323 43.0686310649208)) ^^http://www.opengis.net/ont/geosparql#wktLiteral